Scalars and Vectors - Motion I - 1/14/18

Weekly Blog : Victor N. 8B

Image of Distance (Left) and Displacement (Right)
Image Location : Distace and Displacement Document
 Speed-time graph
Image Location

Summary

Motion is the change in position of an object over time. It can be described in terms of scalar and vectors, distance and displacement, and speed and velocity. A scalar quantity is measuring just the magnitude, which is a number. A vector quantity is measuring both the magnitude and the direction. When you are referring to the distance of an object, you need to identify the reference point to see if it's moving. Distance is an example of a scalar quantity, and measures how much an object has moved during motion. An example of distance is "32 kilometers." Displacement is an example of a vector quantity, and measures the shortest interval connect the initial and final points that are straight line. An example of displacement is "66 kilometers east." Speed is an example of a scalar quantity, measuring how fast an object has moved over a period of time. An example of speed is "24 miles per hour (mph)." Velocity is an example of a vector quantity, measuring how fast an object is moving when changing its position. This also means it measures both speed and direction. An example of velocity is "55 mph/west." On a distance-time graph, the steeper the slope is, the faster the object is moving. In conclusion, motion is the change in position of an object of an object over time.

SP2 - Using Models

Throughout this week, we have been studying physics and working around the topic of motion. I used models when I practice the terms distance which is a scalar quantity, and displacement which is a vector quantity. In the activity that I worked on, it asked for the distance (how far), and the displacement (shortest way to a point). You can find distance by simply adding up how far an object has moved. For example, John walked 3 miles east and 4 miles north. 3+4 is 7, he travelled 7 miles. You can find the displacement by simply finding the shortest way to the final point from the starting point, using a straight line. If the line is diagonal, you can use the Pythagorean Theorem. Using the previous example, you can do 3^2 + 4^2, which equals 5^2, his displacement is 5 squared. As you can see, I used models this week to help me understand motion.

XCC: Stability and Change

Throughout this week, I have done many activities about motion. After doing the activities, I have noticed stability and change. Speed is distance over time. You can look at speed on a graph. In the speed-time graph above, you can that the red line from 0-4 seconds represents speed acceleration, which means the object is moving faster. The red line from 4-7 seconds represents constant speed, which means the object is moving at same speed. The red line from 7-10 seconds represents speed deceleration, which means the object is moving slower. The blue line is moving faster than the red line from 0-4 seconds. This shows me that stability and change through different speeds which helps me understand motion more.

Multiplier: Learner

This week I was a learner, because I wanted to do the research about my topic to learn more. I wanted to gather my notes to answer questions in the Formatives and activities about motion.

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